Engine feed-water supply



No. 608,679. Patented Aug. 9, I898.

E. 8. HOIUGH.

ENGINE FEED WATER SUPPLY. (Application filed. m 11, 1396.

(No Model.)

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EDWARD S. I-IOUGH, OF OAKLAND, CALIFORNIA.

ENGINE FEED-WATER SUPPLY.

SPECIFICATION forming part of Letters Patent No. 608,679, dated August 9, 1898. Application filed May 11, 1896. $erial No. 591,161. (No model.)

This invention relates to improvements in engine feed-water supply. The present invention consists in providing the supply-pipe near and outside the boiler with a spring-actuated valve.

In the drawings, Figure 1 is a diagram showing the position of the pump, boiler-supply pipe, and valve arranged in accord with this invention. Fig. 2 is a sectional elevation illustrating a spring-actuated valve adapted to be used in connection with the present in-' vention.

For the purpose of description with reference to the drawings I will let the letter A designate the pump, which is shown as a plunger or a ram type of pump. The boiler is designated by the letter 13 and the supplypipe connecting the pump and boiler by the letter 0, both of the usual construction.

Placed on the supply-pipe 0 near the boiler is the valve D. The valve D is of any suitable construction of spring-actuated valves. By the term spring-actuated valve as used here is meant a valve which is raised from its seat against the pressure of a spring and which against the spring pressure, and the water rushes through on its Way to the boiler, the pressure therein being overcome by the force of the pump. As the pump reaches the end of its stroke its force is gradually diminished until finally suspended. At the instant the pressure of the pump falls below the com bined forces of the pressure of the boiler and the pressure of the spring thelatter operates to seat the valve gradually against the then nearly stationary column of water. The valve being thus closed, that part of the column of water between the boiler and valve does not recede after the suspension of the pump-pressure. There is, therefore,no backward rush of the column of water caused by the boiler force, and consequently no pound or shock to the pipe or valve.

I am aware that certain forms of feed-water-heater supply-pipes have been provided with a spring-actuated valve located inside the steam-space of the boiler at the end of the supply-pipe. I am also aware that various kinds of check-valves other than springactuated have been used on feed-water-supply pipes near the boiler, and I do not claim such constructions.

Having thus described this invention, it is claimed In an engine feed-water supply such as described, the combination with a reciprocating pump to supply water to the boiler against the pressure thereof, of a supply-pipe connecting the said pump'and boiler, and a valve mounted on the said pipe outside and near the boiler, and providedwith a spring to seat it, substantially as described.

In testimony whereof I have hereunto signed my name, in the presence of two witmesses, this 30th day of October, 1805.

, EDWARD S. lIOUGH.

Witnesses:

E. F. MURDOOK, BALDWIN VALE. 

